Sequence of phenolic units in phenol-formaldehyde polycondensates studied by pyrolysis-gas chromatography / mass spectrometry

M. Blazso, Tibor Tóth

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Pyrolysis-gas chromatographic / mass spectrometric (Py-GC/MS) analyses of phenol-,o-cresol-, m-cresol- and p-cresol formaldehyde novolacs performed at 600°C are presented. The pyrolysis product distribution was correlated with the structural characteristics of the sample deduced from the distribution of dimer and trimer isomers analysed after silylation. The domination of ortho to para methylene junctions of the phenolic units in the structure of the novolacs is reflected in the preference of the production of dimers of similar linkages under pyrolysis. At the same time the distribution of phenols in the pyrolysate reveals the frequency of terminal phenolic units coupled at different positions by the methylene bridge, moreover it shows the preference of joining positions of the phenols inside the chain in the case of phenol- and m-cresol-formaldehyde novolacs.

Original languageEnglish
Pages (from-to)251-263
Number of pages13
JournalJournal of Analytical and Applied Pyrolysis
Volume19
Issue numberC
DOIs
Publication statusPublished - 1991

Fingerprint

phenol formaldehyde
cresols
gas chromatography
Phenol
Formaldehyde
Gas chromatography
phenols
Phenols
pyrolysis
Mass spectrometry
Pyrolysis
mass spectroscopy
Dimers
formaldehyde
methylene
dimers
Joining
Isomers
trimers
Gases

Keywords

  • Formaldehyde novolacs
  • gas chromatography
  • mass spectrometry
  • phenol-formaldehyde
  • pyrolysis
  • silylation.

ASJC Scopus subject areas

  • Analytical Chemistry
  • Physical and Theoretical Chemistry

Cite this

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title = "Sequence of phenolic units in phenol-formaldehyde polycondensates studied by pyrolysis-gas chromatography / mass spectrometry",
abstract = "Pyrolysis-gas chromatographic / mass spectrometric (Py-GC/MS) analyses of phenol-,o-cresol-, m-cresol- and p-cresol formaldehyde novolacs performed at 600°C are presented. The pyrolysis product distribution was correlated with the structural characteristics of the sample deduced from the distribution of dimer and trimer isomers analysed after silylation. The domination of ortho to para methylene junctions of the phenolic units in the structure of the novolacs is reflected in the preference of the production of dimers of similar linkages under pyrolysis. At the same time the distribution of phenols in the pyrolysate reveals the frequency of terminal phenolic units coupled at different positions by the methylene bridge, moreover it shows the preference of joining positions of the phenols inside the chain in the case of phenol- and m-cresol-formaldehyde novolacs.",
keywords = "Formaldehyde novolacs, gas chromatography, mass spectrometry, phenol-formaldehyde, pyrolysis, silylation.",
author = "M. Blazso and Tibor T{\'o}th",
year = "1991",
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journal = "Journal of Analytical and Applied Pyrolysis",
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TY - JOUR

T1 - Sequence of phenolic units in phenol-formaldehyde polycondensates studied by pyrolysis-gas chromatography / mass spectrometry

AU - Blazso, M.

AU - Tóth, Tibor

PY - 1991

Y1 - 1991

N2 - Pyrolysis-gas chromatographic / mass spectrometric (Py-GC/MS) analyses of phenol-,o-cresol-, m-cresol- and p-cresol formaldehyde novolacs performed at 600°C are presented. The pyrolysis product distribution was correlated with the structural characteristics of the sample deduced from the distribution of dimer and trimer isomers analysed after silylation. The domination of ortho to para methylene junctions of the phenolic units in the structure of the novolacs is reflected in the preference of the production of dimers of similar linkages under pyrolysis. At the same time the distribution of phenols in the pyrolysate reveals the frequency of terminal phenolic units coupled at different positions by the methylene bridge, moreover it shows the preference of joining positions of the phenols inside the chain in the case of phenol- and m-cresol-formaldehyde novolacs.

AB - Pyrolysis-gas chromatographic / mass spectrometric (Py-GC/MS) analyses of phenol-,o-cresol-, m-cresol- and p-cresol formaldehyde novolacs performed at 600°C are presented. The pyrolysis product distribution was correlated with the structural characteristics of the sample deduced from the distribution of dimer and trimer isomers analysed after silylation. The domination of ortho to para methylene junctions of the phenolic units in the structure of the novolacs is reflected in the preference of the production of dimers of similar linkages under pyrolysis. At the same time the distribution of phenols in the pyrolysate reveals the frequency of terminal phenolic units coupled at different positions by the methylene bridge, moreover it shows the preference of joining positions of the phenols inside the chain in the case of phenol- and m-cresol-formaldehyde novolacs.

KW - Formaldehyde novolacs

KW - gas chromatography

KW - mass spectrometry

KW - phenol-formaldehyde

KW - pyrolysis

KW - silylation.

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EP - 263

JO - Journal of Analytical and Applied Pyrolysis

JF - Journal of Analytical and Applied Pyrolysis

SN - 0165-2370

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